[]replaceSlotSkinName对于spine换肤不成功

如题，调用replaceSlotSkinName之后皮肤没有更换，用的是spine官方的goblin例子，替换的图片全在atlas里

// 程序入口

class GameMain{



    private m_skeleton : Laya.Skeleton;

    private m_templet : Laya.Templet;



    constructor()

    {

        Laya.init(1334,750,Laya.WebGL);



        this.m_templet = new Laya.Templet();

        this.m_templet.on(Laya.Event.COMPLETE, this, this.parseComplete);

        this.m_templet.on(Laya.Event.ERROR,this,this.onError);

        this.m_templet.loadAni("res/spine/goblins/goblins.sk");



    }



    private onError():void

    {

        console.log("parse error");

    }



    private parseComplete() : void

    {

         let skeleton0 : Laya.Skeleton;

         skeleton0 = this.m_templet.buildArmature(1);

         skeleton0.pos(200,700);

         skeleton0.showSkinByIndex(1);

         

         Laya.stage.addChild(skeleton0);



         skeleton0.replaceSlotSkinName("head","goblin/head","goblingirl/head");



         skeleton0.play("walk",true,true,0,0,true);

    }



}

new GameMain();